Improvement in blind-slat fastenings



UNITED STATES PATENT GEEICE.

HENRY VERHABEN, OF GENESEO, ILLINOIS.

IMPROVEMENT IN BLIND-SLAT FASTENINGS.

Specification forming part of letters Patent No. 155,350, datedSeptember 22, 1874; application tiled August 22, 1874.

To all lwhom it may concern Be it known that I, H. VERHAREN, of Geneseo,in the county of Henry and in the State of Illinois, have inventedcertain new and useful Improvements in Fastenings for Blind- Sla-ts; anddo hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawing,making a part of this specification, in which- Figure 1 is an elevationof the inner side of a blind having attached thereto my improved lock.Fig. 2 is an enlarged front. elevation of said lock detached; and Figs.3 and 4 are edge elevations of the same, showing, respectively, thepositions of parts when arranged to close and to open the slats of ablind.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to enable the pivoted slats ofwindow-blinds to be locked in position when open, partially closed, orclosed; and, to this end, it consists in a bar pivoted to or upon thelower end of a blind-Slat rod, arranged to move vertically, and moved toand locked in position by means of an eccentrically-pivoted cam or disk,substantially as and for the purpose hereinafter specified.

In the annexed drawing, A represents a frame, which has, preferably, theform shown, and is provided within its face with a groove, a, thatreceives and contains abar, B, which bar is capable of heilig movedfreely in a longitudinal direction within said groove. Upon the face, atone side of the frame A, is pivoted eccentrically a circular disk orcam, U, which extends over the bar B, and holds the latter in positionwithin its groove. Two lugs, b and b, are placed near the ends of thebar B, and extend forward in such relative positions as to bear againstopposite sides of the periphery of the cam C, and prevent thelongitudinal movement of said bar, except as said cam is rotated so asto throw it above or below its pivotal bearing, in which event said 'barwill be correspondingly elevated or depressed. An arm, c, secured to andextending radially outward from the pivoted side of the` cam C, enablesthe latter to be easily rotated, while upon the opposite side of saidcam is provided a stop, c', which strikes against t-hc lugs b and b,when the bar B has reached the upper or lower limit of its motion.

The device thus constructed is attached to the inner face of the lowerrail D of a blind, immediately below the rod E, which turns the pivotedslats F, and is connected to or with said rod by means of a bar, B',that is pivoted to and extends between. the upper end of the bar B andthe lower end of said rod.

When the device is thus constructed and attached, it will be seen thatby moving the arm c upward or downward, the cam C will be partiallyrotated so as to depress or elevate the bar B, and, through itsconnection B and the rod E, open or close the pivoted slats F.

The motion of the operative parts is positive in either direction. Theadjustment is easily effected, while when opened or closed theposit-ions of the slats cannot be changed from without, the attachmentoperating as a stop or lock for the same. At any point between the twoextremes of motion, the cam will offer sufficient resistance to themovement of the sliding bar to prevent the wind from turning the slats.

Having thus fully set forth the nature and merits of my invention, whatI claim as new In combination with a bar that is pivoted to or upon thelower end of a blind-slat rod, and is arranged to move vertically, aneccentrically-pivoted disk, caused to engage with said rod and impart tothe same a positive motion in opposite directions, substantially as andfor the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this25th day of July, 1874.

HENRY VEEHAEEN.

Witnesses:

J. C. ROCKWELL, JOHN GRAY.

